Electric power steering system

摘要

An electric power steering system which assists a steering operation by controlling an electric motor on the basis of a target electric current determined in accordance with a steering torque applied to an operation member and applying a driving force to a steering mechanism from the electric motor. The system includes steering torque detecting section; target electric current determining circuit for determining a target electric current in accordance with the steering torque on the basis of an assist characteristic; and motor controlling circuit for controlling the electric motor on the basis of the target electric current. The assist characteristic is offset from an initial characteristic when a motor vehicle incorporating the system is in a predetermined turning state.